Curing agent composition for curing 2-methylene-1,3-dicarbonyl compound

Abstract

A curing agent composition is capable of curing a base resin containing a 2-methylene-1,3-dicarbonyl compound. The curing agent composition contains a specific 2-methylene-1,3-dicarbonyl compound and an initiator. A two-part mixing adhesive contains the curing agent composition and a base resin containing another specific 2-methylene-1,3-dicarbonyl compound.

What is claimed is: 
     
       1. A two-part mixing adhesive kit, wherein:
 (i) a first part of the two-part mixing adhesive kit includes a curing agent composition comprising:
 (a) an initiator comprising at least one basic substance, and 
 (b1) at least one first 2-methylene-1,3-dicarbonyl compound having a molecular weight of 180 or higher and 10,000 or lower, the first 2-methylene-1,3-dicarbonyl compound comprising at least one structural unit represented by formula (I), and 
 
 (ii) a second part of the two-part mixing adhesive kit includes a base resin comprising (b2) at least one second 2-methylene-1,3-dicarbonyl compound, the second 2-methylene-1,3-dicarbonyl compound comprising at least one structural unit represented by formula (I), and 
 wherein formula (I) is 
 
       
         
           
           
               
               
           
         
       
     
     
       2. The two-part mixing adhesive kit according to  claim 1 , wherein the component (a) has a pK a  of 8.0 or higher. 
     
     
       3. The two-part mixing adhesive kit according to  claim 1 , wherein the component (a) is an amine compound. 
     
     
       4. The two-part mixing adhesive kit according to  claim 1 , wherein the component (a) is a tertiary amine compound. 
     
     
       5. The two-part mixing adhesive kit according to  claim 1 , wherein the component (a) is at least one tertiary amine compound represented by the formula NRR′R″, wherein R and R′ are each, independently, a methyl group or an ethyl group, and R″ is a monovalent hydrocarbon group having two or more carbon atoms. 
     
     
       6. The two-part mixing adhesive kit according to  claim 1 , wherein the curing agent composition has a viscosity of 1,000 Pa·s or lower upon being maintained at 25° C. for 12 hours. 
     
     
       7. The two-part mixing adhesive kit according to  claim 1 , wherein the component (b2) comprises at least one 2-methylene-1,3-dicarbonyl compound that is different from any 2-methylene-1,3-dicarbonyl compound in the component (b1). 
     
     
       8. A method for curing a base resin, comprising:
 bringing the base resin into contact with a curing agent composition, 
 wherein the curing agent composition comprises: (a) an initiator comprising at least one basic substance, and (b1) at least one first 2-methylene-1,3-dicarbonyl compound having a molecular weight of 180 or higher and 10,000 or lower, the first 2-methylene-1,3-dicarbonyl compound comprising at least one structural unit represented by formula (I), 
 wherein the base resin comprises (b2) at least one second 2-methylene-1,3-dicarbonyl compound, the second 2-methylene-1,3-dicarbonyl compound comprising at least one structural unit represented by formula (I), and 
 wherein formula (i) is 
 
       
         
           
           
               
               
           
         
       
     
     
       9. The method according to  claim 8 , wherein the component (a) has a pK a  of 8.0 or higher. 
     
     
       10. The method according to  claim 8 , wherein the component (a) is an amine compound. 
     
     
       11. The method according to  claim 8 , wherein the component (a) is a tertiary amine compound. 
     
     
       12. The method according to  claim 8 , wherein the component (a) is at least one tertiary amine compound represented by the formula NRR′R″, wherein R and R′ are each, independently, a methyl group or an ethyl group, and R″ is a monovalent hydrocarbon group having two or more carbon atoms. 
     
     
       13. The method according to  claim 8 , wherein the curing agent composition has a viscosity of 1,000 Pa·s or lower upon being maintained at 25° C. for 12 hours. 
     
     
       14. The method according to  claim 8 , wherein the component (b2) comprises at least one 2-methylene-1,3-dicarbonyl compound that is different from any 2-methylene-1,3-dicarbonyl compound in the component (b1).